I've probably loaded couple hundred thousand on my 650 and its still as good as new.

Depending on the height of your table, the strong mount is nice, also the bullet tray is handy. I don't care for the low powder alarm, as the powder hopper is clear and easily visible. The Powder check is nice though (alarms for individual low/high powder charges).

Get some extra primer tubes and use the Dillon dies, as they have a lead cut in the bottom for progressive use.

AJ

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If you plan to ever load anything but .45, look at the 550B. I have a set of Dillion dies for .45 and they work fine. However, I have loaded THOUSANDS of rounds of 9mm, 38, 357, and 44 using my Lee dies with equally good success at a much lower price. Remember to order spare powder drop dies for other calibers, their only a few bucks apiece.

Like AJ said, bullet tray, strong mount, and extra primer tubes are nice. Also order the spare parts kit for few bucks to save you some late night frustration some day. Finally the item that I can't do without is their primer flip tray...huge time saver.